Everyone is healthy but this one. What gives

This is my second time growing Future #1 and it seems to be difficult to grow. I an also growing critical kush and blackberry moonrocks. Those are both extremely happy and healthy. They all get the same amount of water, nutrients etc. Any idea what is causing this? I am 31 days into flower, roughly 40 days to go. Temps in low 70's, 50-55% humidity, dual 315 cmh, soil grow.

All plants, strains, and Phenos are not alike

Some Sativa hate N, some are heavy feeders, some arnt

Since all the other ones are doing well it's likely just down to plant genetics.